What your suggesting is botting on your desktop PC and viewing it from your phone, so it's not botting from your phone.
Alek, the staff, and all the members of OSBot can sing the 12 days of "it'll never happen" ... until it does. If/when one of OSBot's competitors innovates and capitalises on mobile botting, that'll snatch up a large portion of the botting community, because people are attracted to new and innovative technology (like mirror mode). I suspect the reason for any apprehension is due to the amount of work that'd need to be done to get it to work, and whether the turnover would even be worth it.
It's a completely different platform with different inputs, so there'd need to be a bridging between the desktop and smartphone versions of the bot. But once one bot manages it, then their tech will be reverse engineered, studied, and rewritten.
But the opportunity is too good to pass up!
Mobile-botting
Faster to start-up bot (slow pc/laptop booting)
Easier controls
No more mouse movements = fewer bugs/slow reactions = less suspect
Easier to check up on progress
Can take control whenever you want (instead of PC running at home where it's out of reach)
There are risks too:
Capacity - how many bots?
Risks - what can Jagex learn about your phone via the app?
I'm optimistic and also opportunistic. I got into learning Java because of botting, so I'd like to try my hand at mobile-botting.