Every sin is not the same as every other. You can't compare murder to gluttony, just as comparing gluttony to acting out sexual perversions is'nt correct
When I was taught the seven deadly sins, lust was co-equal with gluttony, anger, envy, sloth etc.
John 8:34, "Jesus answered them, "Truly, truly, I say to you, everyone who commits sin is the slave of sin. "
1 John 3:4, "Everyone who practices sin also practices lawlessness; and sin is lawlessness." (That includes all sins, not just sexual sins.)
1 Timothy 5:22, "Do not lay hands upon anyone too hastily and thereby share responsibility for the sins of others; keep yourself free from sin."
It can be arguede based on 1 Timothy 5:22 that the congregation is doing this man a favor by not being too hasty in accepting him into full membership in the church.
I became a much more humble person when I realized anything less than perfect purity is an abomination to God. It is man who considers one sin better than another. God's standard is perfection; anything less requires grace.