I still do this too for tough projects in languages I know. Too many times getting burned thinking 'wow it one shot that!' only to end up debugging later.
I let agents run wild on frontend JS because I don't know it well and trust them (and an output I can look at).
IMO, the front end results are REALLY hit and miss... I mostly use it to scaffold if I don't really care because the full UI is just there to test a component, or I do a fair amount of the work mixed. I wish it was better at working with some of the UI component libraries with mixed environments. Describing complex UX and having it work right are really not there yet.