Bulldozers aren't restricted vehicles, anyone can buy them. What you seem to be upset at is that they became very cheap and easy to obtain, and everyone is using them to landscape their small front yards and the damage caused is often outweighing the time saved by using something simpler that takes more time and effort. The bulldozers work fine, but if you use a large one to clear everything you might just find you've also taken out the walkway to your door inadvertently, when a small one that took a bit more time and effort would have allowed for you to target what needed attention.

That metaphor has been stretched about as far as I can take it, but it's the tools and people getting access to tools they've not been trained on to do tasks they have no prior experience with. As someone who just laid laminate flooring myself for the first time, I'm keenly aware of both having the right tool for the job and the knowledge of how to use it and knowledge of how to do the task in general affects the end product. The mistakes I made are my own, not the cause of the incorrect tools I used at times.