Is it safe to put attachments and glue on porcelain veneers?

I have 6 porcelain veneers on my top front teeth. I asked my ortho if we can avoid attachments on my veneers. I’m on my 2nd set of veneers. They are 12 yrs old, expensive & in good shape. I can’t handle getting new veneers. My ortho said that they need to at least put attachmnts on my outter veneers. I’m extremely hesitant on putting attachmnts on them. I need them to stay in good shape. Is it safe to put attachments/glue on porcelain veneers? Is there any risk in chips, cracks, color damage, etc to veneers from attachmeents?