God I would not trust Velcro it’s ok for jackets but if you have to lean back it will give way then you would have if like me cracking your head on the gunnels or going for a swim witch are not good idear
No - been using it for a good while now, and some of the Lomond boys have been using it for many years. No problems with it. The overlap area is several inches, and the pressure is applied along the length of it - like a shear force - so you couldn't make it part even if you tried your hardest. Leaning back, the back of the seat would snap off before the velcro gave way.
Then you just peel it off at the end of the day.