It's not just "tribulation". The last days are God's wrath and those in Christ have been promised they will never be subjected to the wrath of God.
1 Thessalonians 5:9 For God has not destined us for wrath, but for obtaining salvation through our Lord Jesus Christ,
1 Thessalonians 1:10 And to wait for his Son from heaven, whom he raised from the dead, even Jesus, which delivered us from the wrath to come.
Truly, perishing because of a lack of knowledge. Someone in ‘the church’ tells them the Tribulation is just troubles, and they do not differentiate the Wrath of God from the wrath of satan and the wrath of man (the latter two having been the hallmark of the Church Age, even today in some Isslimeic regions), well these blind sheep stumble on bravely, falling in one ditch after another.