Professional apps will never be FOSS, it requires specific type of RND teams and constant innovation.
FOSS simply cannot sustain such high costs of making this software from scratch.
That’s why the best thing is GIMP, which is far away from Photoshop/Lightroom, and if we are talking about
professional video/sound/3d editing software, there are no open source alternatives for it at all.
There are some apps, but their features are from the 90s compared to non-free counterparts.
Avoiding making professional work just because the software is not FOSS is not a very smart decision.
Kind of like a “I will punish the bus company, and will walk instead” approach.