Pools want to settle their liabilities as quickly as possible, preferably on chain but thats not feasible often (dust limit, high fees, limited coinbase outputs, etc.). So it would be great to have ark as the fallback option. Once in the ark the user can then decide themselves if they want to keep accumulating inside the ark, pay it out over lightning or withdraw on chain. The decision if paying to p2tr vs to ark is dictated by aforementioned restrictions.
In general it would be cool to just share your normal btc address with someone and then they can derive the ark address and just pay you there. You can then claim your vtxo whenever (ofc accepting the tradeoffs).