the repudiating party just has to be prepared to pay damages to the other party arising from the breach.
....all sounds fantastic in theory....
However most experienced Landlords on here know only too well that chasing down a defaulting Tenant, with no assets, no forwarding address, sometimes no job and no income is very much easier said than done.
The onus (and substantial cost and time) is upon the Landlord to chase the defaulting Tenant. The RTA simply doesn't have the teeth to enforce these principles. If a forwarding address hasn't been supplied, and the Tenant disappears into the ether, no further action can be taken.
The vast majority of experienced Landlords who have been placed in this identical situation by Tenants who choose to not fulfill their obligations within the fixed term of a Lease would place their pragmatic hat on, ignore the losses their Tenants so causes, and get about simply spending further time and money getting the premises into a fit state for presentation for a new Tenant.
Most savvy Tenants (and they all talk amongst themselves) quickly realise this and simply skulk off....knowing full well the vast majority of Landlords will simply be left carrying the bag. Their assumed derision for some heartless and money hungry Landlord also plays a big part in their decision process about which way they decide to "play the game".
Having a lawyer advise them to "play the game" in the manner to which you advise is simply outrageous, despite it being wholly within the law to do so.
As I said previously, the rules of the game are completely stuffed.