I need to improve my knowledge and skills related to 3-D printing first, then I'll make the plunge.
As many have noted, 3-D printing isn't easy. A big part of the reason is that the technology isn't well developed yet. As others have noted, 3-D printing is also over hyped. A big part of the reason is that the idea is exciting, but it takes a particular type of personality to have a use for it.
Yet this simply means that 3-D printing is of limited value as it stands, and as it will continue to stand. (It will become more reliable, but it will never become convenient.) It does mean that the people who end up using it will have a mindset where they want to create their own stuff. Some of those people will be inventive, while others will want to know how their stuff work. Some will be tinkerers, while others will take pride in what they create.
So please stop with the negativity. If it's not for you, that's fine. If you can't honestly recommend it to other people, that's fine. But also understand that there are other people who want to use 3-D printing and have good uses for 3-D printing.