Which is 100% the truth - your chances of approval when applying for a lower degree than you already have is extremely low especially for mature applicants. We see it here on a daily basis. Not impossible, but very low.
People coming here to post anecdotal stories of their friend/cousin/sister/brother etc with a Masters degree in Computer science who applied for a diploma in baking and had their study permit hand-delivered by IRCC official to their home won't change the statistics that we see, just using this forum only as sample population.