I'm pretty sure there are plenty of niche houses that are worth the price, but there are also plenty of designers and "faux-niche" houses worth their price.
Now I don't know how perfumers get paid, but if they get a percentage of sales revenue, it would explain why they don't give their best formulations to the designer houses. Let's say you create a banger and you give could either give it to Hugo Boss, who will call it Boss Bottled Intense and sell it for 40 bucks per 100 mL, or you give it to Parfums de Marly, which will aggressively market it by sending it to every YouTuber in existence and sell it for 250 bucks a bottle and call it Layton. You would have to sell at least 5x more BBI to make up for the difference. Now if they get paid for just the formulation, it technically shouldn't matter to them, but then again I'm sure they want to get "re-hired" for another formulation, so they'd still give their best creations to the better paying houses.
As a result, Dior, Guerlain and Chanel make solid fragrances due to having in-house perfumers which are probably salary-based. There's no "formulation pressure" on them, although these houses also have created exclusive lines to cash in on their perfumers best creations by now.
Personally, I own everything from regular designers, better designers, "faux-niche" and "real niche".
Designers are the perfect creations for every day. Easy to wear, cheap to buy. I opt for the mentioned better designers because I'm often not pleased with the performance of many cheap fragrances.
The "faux-niche" stuff tends to often reiterate on popular fragrances. The perfumers provide louder or more balanced creations of designers, probably with more ingredients, while also taking longer to refine. This stuff is super popular right now for a reason. You get the pleasing designer fragrances at a perceived higher quality with more power. There's no reason not to sample some of this stuff. And how the fuck is this comment already 2000