I SO agree. Most of us have already done far too much rationalizing - time to just be brutally honest about how much money there is in the collection. Some may be gifts, but I don't see spending a giftcard on makeup or asking for specific items as different from spending. Not really - often we chose to receive that and just financed it with someone else's money.
Disclaimer: My educational background is finance and I have financial planning and various securities designations so I'm really passionate about people's financial security. I say this only because I've seen so many financial plans get derailed with unthinking, small purchases that add up to a crap ton of spending over time. It doesn't seem like a big deal to buy a $20 lipstick or $10 nail polish or a few palettes. Until it's done 50 or 100 times and suddenly we're talking about real money.
I am in no way being judgmental about loving or buying makeup - it's my vice too and like all of us I have more than I need. I've bought a lot lately and I want to just pause now, have fun getting to know my new additions and figuring out what I can do with them. I'm dreaming of a big trip with my family this coming summer, and I'm going to be tough on myself because it's ridiculously easy to spend a thousand dollars (or two...or more) on makeup and skincare without meaning to a bit at a time without even realizing it. That's why I'm spreadsheet girl. Not only does it force me to be honest, but it keeps me in control.
I think it's great that you're thinking of stepping back and investing in training instead of more makeup. Not only does that open up a potential new career path for you but I'm sure you'd figure out lots of new ways to work with what you already have.