Why arent more people using crypto cards for spending?

Seems like obvious move for anyone holding stablecoins but adoption is still pretty low.
Been looking into it because i keep usdt on hand and figured why not spend it directly instead of constant off-ramp fees. Infrastructure exists visa acceptance works cashback programs exist but when i search cant find clear answer on why uptake is so slow.
Is it trust issues with the companies? cashback not competitive enough? tax reporting too complicated? people just dont see the point when traditional cards work fine?

Whats actually holding you back if youve considered it?