Most mid to higher handicap players don’t have the swing speed or swing technique to really benefit from longer irons. I would highly recommend investing in hybrids however. You’ll simply have to far of a gap in distances to cover from 6i to 3w and 5w in a typical round from 200+ yards away. And with any wind in your face you’re not reaching greens from 190+ with a 6i, but your fairway woods will still be too much club to hit and don’t achieve the lofts you need to hold greens from shorter ranges.
Better players with higher swing speeds benefit still from 3,4, and 5 irons. You’re going to be able to flight those clubs at different trajectories versus hitting hybrids from longer distances. For example, down wind shots from 200+ yards require much higher apexes and spin to hold greens. So I’m going to send it high. But if the wind is in my face, then I’m going to opt for a flighted shot that’s low in trajectory with low spin. You can’t achieve much of these variations with hybrids. But to the higher handicapper who doesn’t play much, they don’t have the consistency or swing speed to pull these shots off. So they benefit from the design of a hybrid to maximize the consistency they’ll achieve from longer ranges.