The purpose of these pieces of fake wood appears to be to spread out the stress from the strap. I have no idea whether this method is any more likely to fail than a purposely designed part or what the dangers are if this does fail, but that isn't a particularly complicated or demanding task. It is possible that a purposely designed part would provide no real benefit over this seemingly hacky solution. If that is the case, why not go this route if it makes assembling things easier?

I have no idea the risk/reward equation here. I am guessing most people voting and commenting here have no idea the risk/reward equation. My comment was only pointing at that lots of people are going to have an opinion on this that is mostly dictated by their previous assumptions about Tesla as a company.