Not sure which brand you are looking at. Without a metal insert, plastic shoes offer no hoof support. Hoof tends to spread out with use. Some brands have almost no grip on grass, mud, other surfaces. Not all are able to be shaped to correctly fit the hoof, so may not really be helpful.
Have you checked the cost? Glue-on are expensive to purchase, so mark-up thru the Farrier having to get his investment back, can make them very costly. If you think to do them yourself, PLEASE invest in a VERY GOOD protective respirator to protect yourself. Fumes from the glue cause headaches, long term damage by breathing it in. We know one fairly young Farrier who got lung damage not using a respirator. Most of his practice was glue-ons, so he got a lot of exposure to fumes. Others tried to warn him but he ignored the advice. Not working as a Farrier anymore, not sure of his current healthā¦
The glue-on shoe makers offer Clinics, DVDs with infornation and advice on how to be safe when using the products. Nothing to just jump into.
If you can do what you like with using a barefoot horse, that is great. But if horse needs more wear protection, better traction, consider getting horse shod. I do not think using shoes nailed on to ādamage the hoofā when properly done. Hoof certainly will grow out to get nail holes gone when shoes are removed, no imperfections left to see then. Some of our horses have worn shoes year around for many years. They are sound, never been lame, ready for any task we want to do. Their hooves are not damaged, have no hoof issues. They get used hard, still no problems.
I like a good barefoot horse myself. But some uses of our horses let them go better when shod, like in the snow now. They have ice studs and snow rim pads to give grip on ice, prevent slipping with snowball build up. Other times when getting them conditioned, the 8 to 10 mIles of daily work would wear the hooves down to nothing on road surfaces. So they are kept shod for hoof protection. The practice of shoeing horses is not evil or harmful when correctly shod.