Read the following argument regarding the influence of public transportation on urban development:
Advocates for enhanced public transportation systems argue that such investments lead to significant improvements in urban planning and community development. They contend that efficient public transport reduces traffic congestion, promotes economic growth, and encourages sustainable city living. While some city officials maintain that costs overshadow benefits, these advocates highlight successful case studies from cities like London and Tokyo, suggesting that long-term sustainability will ultimately outweigh immediate financial concerns.
Based on this argument, evaluate the strengths and weaknesses of the provided evidence in relation to urban policy.