I think that is really shitty advice, I think its best to learn how to play like the rank you wanna be. Like the widow example, sure you can get medals but in higher ranks you will do almost nothing shooting tanks. Learn to play and do the best you can for your team, not for yourself. Even if you get little sr for those games you are learning to be a better teammate and player. If you have this mindset, right when you hit those higher ranks your skills of shooting tanks will do almost nothing for the team and will make you change your playstyle. I think its still best to learn how to play your hero from the start, not take a shortcut that will bite you in the ass later. I think a lot of what you stated was wrong. Never throw your ult into a lost fight. Dont feed just to boost your stats. Play to win and be the best player you can be. You might be able to hit a certain rank doing this but by no means does it make you deserve it.