I know this can be confusing to new users, but we are strictly a questions and answers site. No discussion. The answer you posted was basically "yes, I have this issue too". While this sort of post is welcome on forums, it is not actually answering the question and so it doesn't belong here. If it isn't a question, or it isn't providing an answer to an existing question, then it won't be welcomed here.
Now, you then edited to provide an answer you found. That's great! had you only posted that, nobody would have objected (quite the contrary). Another user has now edited it, and I have undeleted it.
As for commenting and the reputation system, that's actually one of the good things about the Stack Exchange system. Reputation is an indication of how much the community trusts you and it can also motivate people to write good, clear and comprehensive posts. We require 50 rep to comment primarily as a spam prevention measure. We get a lot of spam, and this blocks random accounts from spamming the comments.
Also, comments are second class citizens here. We don't want them, and we try to avoid them. Ideally, comments will only be posted requesting or providing a clarification which is then integrated into the post and the comment is deleted. In fact, moderators often go around cleaning up and deleting old comments.
Another important reason is that since we have a very different set of rules than the forums most users are familiar with, we don't want to let new users comment before they've had time to see how this site works and understand the local culture. This is not a place for discussions. There are hundreds of other sites which welcome discussion. We don't. Think of these sites as more of a collaborative wiki than a forum. The aim is to amass a large collection of useful information with as little noise as possible. Comments, usually, add to the noise and not the information.
The same basically applies to asking here, on meta. If you haven't participated in the site (by posting something) you are unlikely to be a bona fide user who wants to ask about how the site works. Allowing accounts with no activity on the main site to post on meta would just be inviting a spam wave here. Believe me, I'm one of the elected moderators whose job it is to deal with such waves and I really don't want to see the same amount of spam we get on the main site (where you need no rep to ask or answer) start being posted here on meta too.
So, just spend some time, get some rep (50 rep is just 5 upvotes to an answer or 10 to a question), and I'm sure you'll see that the benefits of this system far outweigh the drawbacks.