May I offer an alternative opinion:
I was refused a class 1 because of ophthalmic concerns. Being in the 'trade' I was able to obtain supporting evidence from ophthalmic colleagues and successfully appealed.
However every class 1 renewal was a concern and it became increasingly difficult to meet the requirements.
I only required a class 1 to support my occasional FI work, not for a full time aviation career.
I would be very cautious on embarking on an aviation career (with all the associated costs) if there was any concerns at the onset on being able to maintain class 1 medical certification.