By "subnetworks" do you mean "sidechains"? If that's the case, then yes, they're a much safer and reliable option than the LN.
The main difference is that sidechains
always rely on a certain third party, while LN can be custodial. I'll repeat what I said during high fees in 2017: I don't care
how Bitcoin scales, as long as it does it.
"bitcoin scales"
not "stop using bitcoin, abandon bitcoin and use another network...... that is not bitcoin scaling. thats bitcoin abandonment
these LN fangirls who idolise people should stop using bitcoin and adopt LN are not here to scale bitcoin or want bitcoin to scale. they want bitcoin to fail and other networks to replace it as the things people are locked into