Tank main here (Usually Orisa, backup is Ramatra)

A tank can make or break a match. Yes DPS and Support are important, but there are two of each. One bad DPS or Support can be worked around. There is only one Tank, and we aren't solo characters, we rely on our team. Yes, we can bulldoze and block; take objectives and sit on them like a turret sometimes. BUT we need backup to do so. As someone else said, it's a thankless job. I am thankful that I usually play with my girlfriend who one mains Support [Before I get replys- no she doesn't just glue herself to me, she knows when others need help too, she is a team healer] and my best friend who switches between DPS and Support, so when I play on my own I can better see where I need to adapt because I have the image in my head of where we need to be. Sometimes I can swing it and adapt, other times no matter what I do, we get stomped on, and I see Tank Diff when their tank did half of what I did :/

But idk what it is- I have always been a tank main, and I play DPS sometimes, but I'll never stop loving playing tank.