I have a number of watches with A7750 movements all are at least 1 year old (some 3 to 4yo), all work as good as the day they were purchased...and a dirty little secret....only two have been serviced.
You need to remember that the issues posted on this forum reflect a very small portion of the rep buyers from our member base, the vast majority never posts, unless they have issues.
That said yes you should get your watches serviced if you want them to last and if you ask around town you will always find a watchsmith that will do the work.
Ken