I believe that my question is moreso two parts. The first is if it counts (what I initially asked).
The second is if it matters. A lot of my pre-med friend are in internships with these fancy research labs and these fancy hospitals so would it be considered not-as-valuable to take on a more entrepreneurial aspect for some of my major EC's?
I think starting your own t-shirt business would be an interesting thing to talk about with interviewers. Obviously I don't know the details, but from what you have provided, it certainly seems like a worthy item to put on your application.
Look. This has been answered for you over and over in all your threads about ECs when you ask "Can I do this? How will med schools feel about that?" The problem is you're throwing a million darts out there and trying to make one stick. First you say you want to do a club sport, then be captain of a club sport, then you want to do a youtube channel, and now sell tee-shirts...
How about finding something that you just really want to do and sticking with it throughout college, take on a leadership role in that activity, without second guessing everything? It doesn't have to be medically related; just show commitment and genuine interest, and that will come through on your application. In the meantime, you're a freshman so focus on school, get some clinical/nonclinical volunteering in, and start thinking about doing some kind of research this coming summer or next year. You'll find you'll have a much more enjoyable college experience if you quit being so focused on what Adcoms will think and just do stuff for yourself because you sincerely enjoy it.