The Residential Tenancies Act, 2006 aside, the real test for a buyer is whether an issue is a safety or structural problem versus a maintenance item every home eventually needs. A foundation crack with active water intrusion deserves real caution, while a dated furnace with years of service life left is a repair credit conversation, not a walk-away.
Walking away makes sense when an inspection uncovers something outside the scope of normal negotiation, undisclosed structural movement, unpermitted work that affects the assessment record, or a cost so large it changes the deal's economics entirely. Everything short of that is usually worth a conversation before a decision.
Get your hand-reviewed valuation from Joel Dyck.