Bombs are great for clear cutting anything but mostly for saving time and effort. Bomby Farmland clearing is my speciality as
@stardew_luv alluded to.
Mostly for the BOOOOOMy fun though!
But as
@riklaunim said, you don't get any experience from it so its utility is variable. In early game I want that sweet sweet Foraging XP even though it takes
forever to chop Trees (I leave a lot of stumps in Spring), plus Bombs are unavailable or expensive. In mid game is when Bombing Trees is best as you don't have the Iridium Axe yet but Bombs are reasonable cost, so I'll occasionally use them there.
In late game though I just don't need the Trees. And if I do, 3 Iridium chops and I have 22 Wood. The best place for Bombing Trees is if you full plant the Railroad/Desert/Quarry with Trees as you'll get tons of Wood from your BOOM and the sound of all those Trees falling is really quite pleasant. Like cicadas except you can build more than just macabre dioramas from the carcasses.
Remember to replant though!