Do u think male friends are always a backup plan for a woman?
That's only part of it. There's a lot more to it than that.
As I've said before, I don't believe that women actually have an agenda. They do whatever feels right. Having male orbiters that she's somewhat attracted to can turn into men who "feel right" due to them appearing to become more "alpha", breaking up with their GFs, or the woman's BF turning more beta. There's also the orbiters who would like to fvck your GF. They will ultimately become c0ck blockers in some way, shape or form. You are now going to find yourself dealing with their bull5hit as well as any of the bull5hit she happens to throw your way.
Last but not least, if you see this woman as an investment, your emotions are going to get fired up when she's associating with the orbiters. Men naturally become emotionally charged if their investments and property becomes at risk. So now you're having to deal with your emotional bull5hit which is stemming from her bull5hit and the bull5hit from the c0ck blocking orbiters.
Keeping a woman who has no male orbiters cuts out a lot of bull5hit. I personally have enough of my own bull5hit to deal with along with any she brings to the table. I don't need the bull5hit of her fvcking guy friends added into the mix.
However, if you're just agreeing to a LTR so you can get an extended pass on fvcking her and have no desire to seriously invest in her, then you can disregard all of this and let her keep her orbiters.