Often making a quality long lasting product isn’t as simple as spending a few pence more on higher quality parts or materials as most parts in say a drill are made specifically for that tool, not off the shelf.

High quality brands invest millions in teams to design, research and test these items not to mention a long established brand has had time to evolve their product, this is factored into the final cost. A new manufacturer or budget one often won’t have these resources, they know the principles of how a drill works, they have seen other drills but they can’t afford to test it to the same level or spend so much on r&d so they do their best check it works and sell it. Problem is later the failure is usually some small part of the design which unfortunately didn’t get enough development and testing to fix. Could be a power transistor which couldn’t deal with long term use and fails after a year of regular use, could be a button that can’t deal with so many actuations or insufficient cooling when used in certain temperatures or environments. Point is the aspects are tested and sorted by high end brands often costing nothing to manufacturing as it may just be another equally priced component or having a better fan blade design.