You have to have confidence in your equipment. If you don’t it will undermine your dive, causing stress , putting not only you at risk but your dive buddies.
Yearly equipment service is important but is it necessary? A year may be a industry standard but if a diver is logging 300 dives a year and another is putting 100 how can they both end up needing the same service interval? I think it comes down to your judgment and if you notice differences in equipment performance. I think a year is good as it’s more related to the break down of synthetic components. I think were fortunate that most scuba equipment if it fails will provide enough air to service.