Training horses always involves some risk of injury (or even death) to the horse, the trainer, any spectators, equipment used, etc. - this risk is totally your own as you will be making your own judgements on what to do. As with any suggestions on any subject you must weigh them out for yourself and proceed accordingly - at your own risk.
Yes the horse can be taught to be responsible to move itself into position so you can easily mount from any raised mounting platform. It is so much easier to have the horse move itself into position to pick up its rider than trying to position your horse next to a mounting block then climb up only to have the horse move away and you get down again and move the horse back over - again and again. Yes make the horse responsible to move itself into position so you can easily mount it from a raised mounting platform.
Horses, like humans, learn at different speeds. And horses you have taught a LOT are likely to learn more rapidly from you - they have figured out your approach to teaching. So I have included videos of different horses which most decidedly learned at different speeds - with hopes this gives you a clearer picture as you prepare to teach your own horse - at your own risk - to pick up his/her rider from a raised mounting platform. The range in learning speed of exactly the same skill is HUGE in horses. I have had horses learn this skill in a single session of 12-20 minutes in total length and never need another session - just keep getting better and better at it from actual use. I have had other horses take over an hour in the first session and then take a number of sessions after that - usually hitting a moment when suddenly they get it (a lightswitch turned on moment if you will.) The key is to end on a good note every time you work on this.
This is session one with Ashur a 5 yr old TWH gelding.
This is session 2 with Ashur a 5 yr old TWH gelding.
This is session 3 with Ashur a 5 yr old TWH gelding. And yes, my objective is to get the horse to actually accept it has their responsibility to move themselves into position so their rider can get on easily. That is what I am working toward. That clicks soon with some horses - it clicks late with other horses. Work on it until it clicks with the horse you are working on - that may not be the first session - but it may be the first session - it GREATLY varies from horse to horse.
This is my personal horse, Avi, being taught this exact same skill when she was 8 yrs old - a year and a third after I bought her as a green broke 7 yr old. This was session one - but it was also the only session with Avi. There was no session 2 - just use the skill and get further polished by actual use. But this is NOT a green horse being taught this skill - it is a well trained horse that simply had not yet been taught this particular skill. A horse that has already learned many new skills from a particular person is likely to learn yet another new skill faster. They have learned the teaching style of their teacher.
If you want to see videos of me doing this training on some other horses please feel free to search on my CountryJackG Rumble Channel - I have taught this skill to quite a few horses - no, I don't always record it - so you might not find a recording of me training a specific horse you were hoping to see. But I have recorded it quite a few times with different horses - with very different learning speeds. So if you search you will likely find an example similar to what you face with the horse you want to teach this skill to. ---- Training horses always involves some risk of injury (or even death) to the horse, the trainer, any spectators, equipment used, etc. - this risk is totally your own as you will be making your own judgements on what to do. As with any suggestions on any subject you must weigh them out for yourself and proceed accordingly - at your own risk.