True, but the way HEL operates shorthaul busgates IME, the priority lane is used for all customers as soon as the initial few priority customers have gone thorugh. This is done as there are only 2 scanners and they would make the boarding overall slower if they didn't use both. This means that a few minutes after boarding started, there is no way of jumping the line.
Other airports have a slightly different approach. They offer physical infrastructure to make sure there is a priority path that bypasses the crowd and leads to one of the scanners. Then that scanner can serve both priority and non-priority simultaneously. IIRC gates 23A/B has very little physcial space and couldn't do this even if they wanted.