No I don't think so, I think when you reach a certain level of holdings you wouldn't want to risk that value in a shared UTXO model or at the very least trim down your exposed position.

I know fees can be a pain but pain has an upper limit, its not like people are going to be bidding a million sats per vbyte, block space has a price and it will change from day to day and if you're planning on holding long term on chain, even 1% fee of your stack is still less than you're paying for custodial services like ETFs

Shared UTXOs may be more common in the future with channel factories and ark, but I don't see that being the default, those UTXOs would be shared because their turn over between users is quick