what.. I think need a thread for unfortunate events that this community has experienced o.O
I like the idea of grippy boots - you need something
to help keep the foot in. Even having stirrups with some sort of tread can help instead. OP can even think about investing in your own stirrups to swap out. Correct stirrups and leathers are something you can personalise without needing to actually own the horse so I have always thought it's fine to commit to these two items (in English riding, can't comment Western never smelled a Western saddle lol!).
EDIT: I have three pairs of riding boots and one of them, my ankle boot cheapies, I might as well be standing on butter. When I switched out full knee boots which were for the yard so better grip and overall stabilisation was a game changer. Does it mean I suck without them? Yeah ... pout.