If need, you can backup your "steamapps" folder when games there. But if there are 'account folders" into, delete 'em too.
Reinstalling steam and following exactly the steps are for more secure because people are usually logging and logging into many and multiple accounts. These accs infos are saved into Steam folders into some files and folders. That's why is best - fully clean install of Steam.
I'm using it from many months ago, maybe a year or so, and so far no problems.
This one was the only account that was disabled but was
not my fault as you can see / read there

.