EBITDA is considered a more reliable indicator because it enables investors to focus on a company's baseline profitability without capital expenses factored into the assessment.
For big companies which have large amount of depreciation expenses, EBITDA can give a more accurate picture.
When you take into account the interest, tax, depreciation and amortization, it helps you find out what happened with each of these accounting items and how the company's overall profitability was affected.