Why is it not possible to quote OPTIONS with list arguments with bracket syntax?

[ClausKlein]

If using CMake 3.0 or later, an alternative to quotes is to use the lua-inspired bracket syntax where the start of the content is marked by [=[ and the end with ]=].

function(print)
  message(STATUS "ARGC = ${ARGC}")
  message(STATUS "ARGV = ${ARGV}")
endfunction()

set(text [=[LIST_ARGUMENT "a;b;c"]=])
print("${text}")

CPMAddPackage(
  NAME Dependency
  SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/dependency
  OPTIONS
    "DEFINE_ALTERNATIVE_FUNCTION YES"
    [=[LIST_ARGUMENT "a;b;c"]=]
  EXCLUDE_FROM_ALL YES
)

output:

-- ARGC = 1
-- ARGV = LIST_ARGUMENT "a;b;c"