IMO philosophers get into trouble because they want to nail down what is "real" or "true". They try to work by pure logic, but alway get tied up by the limitations of spoken or written language. "Infinite" for example is a logically imprecise term; there are different flavors of mathematical infinity.

Perhaps a more valid way to phrase the same sentiment would be to say that science, because of its assumptions and methodologies, can only address phenomena that are spatial, temporal, and causal. There might be real things that have none of those attributes; science and philosophers would have difficulty studying them, but that difficulty does not rule out the possibility of their existence.

edit: spoken or written