The phrase "convenient excuse" refers to a reason or explanation that someone uses to avoid doing something or taking responsibility, which is easy and suits their situation. Full definition
Even your parents can find many convenient excuses to avoid the process. (abramsinc.com)
Both forms of denying our embodiment in this world provide convenient excuses for ignoring the needs of others as individuals are allowed to focus solely on their own personal spiritual needs.» (rachelheldevans.com)
Why, or when rather, aside from convenient excuses accomodating lame reasons like no effective tranquilizers or appropriate relocation options, are we going to start extending our human hand in kindness and empathy by helping rather than killing. (dotearth.blogs.nytimes.com)