All big brands aren't the same, all indy's aren't the same, no doubt. Both have access to the same base material, edge material, fiberglass, carbon, rubber laminate, top sheet material etc. Both big and indy want to sell skis and make a profit, however the paths are quite divergent.
Take the big brands. For the most part they are part of large public companies. The want sales and they want profit before all things. They design they're skis to hit as big a market segment as they can at a price point that will sell the most skis. They design and build their skis at a cost as low as possible to satisfy the design, price point and quality targets. Design and build comprises are made, this is the simple reality of the world in which they live. It is foolish to deny or ignore this reality. Do the big brands make some great skis of course they do. Do they make a lot of really bad skis, no question. Some are built well, some are trash.
How about the indy's? They have significantly more design and build freedom. More flexibility on pricing. Don't have a board and shareholders breathing down they're neck to increase sales and profits. Many use these advantages to build really interesting skis built with the best materials and craftsmanship. Do they build some goofy skis that don't work, sure. Are there indy's that don't build the best quality, absolutely. Are the indy's that build as good or better than the best big brands, yep. Indy's give you the opportunity to find a really great, outstandingly built ski with great graphics that by and large you can't get from the big brands.
I currently ski both, I have owned both in the past. I have owned really bad indy's and really bad big brands. I have also owned really great skis built by both. You can find good skis made by either group and there is nothing wrong with going either way. Its personal preference. At this stage of my skiing journey I prefer the indy's, that's my choice. You do you, I'll do me.