The rubber is just some buffer to allow you to get the zip ties taught.
It'll flex and allow you to really clmap the zip ties down better ans the rubber can be hidden out of view, since you have to hide the zip ties also.
This is why I like screws, no need to go all SS, the typical screws last a no# of years, I've had strong pressure on some pieces for 5 years without much issue.
A drill, and no glue mess or wobble.
Add another hole and an another screw.
This does not work well for smaller pieces however, then the zip ties are good alternative, anything that can handle a few screws and has enpough wood diameter and strength is nice to screw since the holes are VERY easy to hide.
I am more like a carpenter than a scaper when I work with wood.