The battery does matter! It will inflate and if you keep it fully charged like the guy above under heat constantly. And that can cause damage to the interior. I have had laptops, phones, die on me because of that.
Just keep using the battery charge limiter and keep it at 60%. It's better to keep it at 40% but no such option is available. There is no memory issue with lithium battery so 59% charged to 60% is nothing bad. The battery will self discharge so it is not avoidable. Also, just remember to discharge it completely a month or 2 and recharge it to keep the battery life calibrated.
How many years do you want to use it?
We are talking about a gaming laptop.
Buy a new one in two or three years, nothing will blow up in that time.
If the laptop is very expensive, the battery can always be replaced.