Good observation about Christendom's ' clergy/ laity class distinction, because that is in No way part of 1st-century Christian teachings.
Jesus makes such class distinction as clearly wrong at Matthew 23:8-10; Matthew 23:11-12 - all are ' brothers ' .
Yes, No one is saved by walking into a religious ' house of worship ' because as Jesus taught we must endure to the end - Matthew 24:13
That would mean endure faithful until either the end of one's life, or endure faithful to the end of these last days of badness on Earth before Jesus begins his 1,000-year governmental rulership over Earth, when Jesus, as Prince of Peace, will usher in global Peace on Earth among men of goodwill.
If we endure to the end times of badness on Earth, then we can be ' saved/rescued/delivered ' through the coming great tribulation of Revelation 7:14; Isaiah 26:20