Yes, reading quotes can be "
tedious", but you don't have to read the quote - that is the whole point of quoting. Quoting gives the reader a clear option to read just the message, or to also read the quote. It's up to the reader. One knows what is
the message and what is
quoted text from previous messages or other sources. If the detail, or the background, is required, then read the quote.
Mixing the quotes into the text
reduces that option,
even if italics are used, because it make it much harder for the reader to distinguish the quoted text from normal comments and opinions where emphasis is implied through italics (as done here). So, my 2 bobs worth

, quoting is preferable when including large blocks of text authored by another person.
This also raises another related point. Some folk quote the whole post of another member before responding to it. Sometimes this extends to quoting the post in full, even when it is the post just above their response. I think sometimes we over quote. I think it is rare that one needs to quote in full a previous posts in the same topic. IMO a poster only needs to quote when s/he wishes to refer to a specific point in a previous post. Still, if it is quoted correctly, the reader has the option to
not read the quote.

And its not like there are any rules for this, so this is all just food for thought.